This is the Atlas Copco rotation chuck set (WS) part number 3121500180, Crowder SKU AC-3121500180. Retaining the tool steel is its whole job. Worn retention lets the shank hammer against the bore and turns a cheap part into an expensive front head.
You will find it on the diagram for the BBD 46 WS/WR Rock Drill.
Use the full diagram library to work through the rest of the assembly, or the Atlas Copco tool range if you are pricing a replacement machine. Ships from our Denver warehouse; in-stock parts ordered by 4 PM ET go out the same day.
- Part number: 3121500180
- Manufacturer: Atlas Copco
- Crowder SKU: AC-3121500180
- Listed on breakdowns for: BBD 46 WS/WR Rock Drill

